/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */

// InputChannelInfo.h
#ifndef INPUTCHANNELINFO_H
#define INPUTCHANNELINFO_H

#include <string>

namespace omnistream {

    class InputChannelInfo {
    public:
        InputChannelInfo();
        InputChannelInfo(int gateIdx, int inputChannelIdx);
        InputChannelInfo(const InputChannelInfo& other);
        InputChannelInfo& operator=(const InputChannelInfo& other);
        ~InputChannelInfo();

        int getGateIdx() const;
        void setGateIdx(int gateIdx);
        void setOmni();
        bool getOmni();

        int getInputChannelIdx() const;
        void setInputChannelIdx(int inputChannelIdx);

        bool operator==(const InputChannelInfo& other) const;
        bool operator!=(const InputChannelInfo& other) const;
        bool operator<(const InputChannelInfo& other) const;

        std::string toString() const;

    private:
        int gateIdx;
        int inputChannelIdx;
        // if the InputChannel is an OmniLocalInputChannel?
        bool omni = false;
    };

} // namespace omnistream

namespace std {
    template <>
    struct hash<omnistream::InputChannelInfo> {
        size_t operator()(const omnistream::InputChannelInfo& info) const noexcept
        {
            static constexpr size_t kHashCombineConstant = 0x9e3779b9;
            static constexpr int kLeftShift = 6;
            static constexpr int kRightShift = 2;

            size_t h1 = std::hash<int>{}(info.getGateIdx());
            size_t h2 = std::hash<int>{}(info.getInputChannelIdx());

            return h1 ^ (h2 + kHashCombineConstant + (h1 << kLeftShift) + (h1 >> kRightShift));
        }
    };
}

#endif // INPUTCHANNELINFO_H